File list (Check if you may need any files):
javachatroom\workspace\.metadata\.lock
............\.........\.........\.plugins\org.eclipse.core.resources\.history\43\70891ed06f930010176cfced3be5d6bc
............\.........\.........\........\..........................\........\.6\d0c8dcfe6f930010176cfced3be5d6bc
............\.........\.........\........\..........................\........\a6\d0aa6ea96f930010176cfced3be5d6bc
............\.........\.........\........\..........................\........\c7\d0d880826f930010176cfced3be5d6bc
............\.........\.........\........\..........................\.projects\java\.indexes\bd\history.index
............\.........\.........\........\..........................\.........\....\.markers
............\.........\.........\........\..........................\.........\....\org.eclipse.jdt.core\state.dat
............\.........\.........\........\..........................\.root\.indexes\history.version
............\.........\.........\........\..........................\.....\........\properties.index
............\.........\.........\........\..........................\.....\........\properties.version
............\.........\.........\........\..........................\.....\1.tree
............\.........\.........\........\..........................\.safetable\org.eclipse.core.resources
............\.........\.........\........\..................untime\.settings\org.eclipse.core.resources.prefs
............\.........\.........\........\........................\.........\org.eclipse.debug.ui.prefs
............\.........\.........\........\........................\.........\org.eclipse.jdt.core.prefs
............\.........\.........\........\........................\.........\org.eclipse.jdt.launching.prefs
............\.........\.........\........\........................\.........\org.eclipse.jdt.ui.prefs
............\.........\.........\........\........................\.........\org.eclipse.ui.editors.prefs
............\.........\.........\........\........................\.........\org.eclipse.ui.ide.prefs
............\.........\.........\........\........................\.........\org.eclipse.ui.prefs
............\.........\.........\........\............debug.core\.launches\Fuhuqi.launch
............\.........\.........\........\......................\.........\Kehuji.launch
............\.........\.........\........\..................ui\dialog_settings.xml
............\.........\.........\........\....................\launchConfigurationHistory.xml
............\.........\.........\........\............jdt.core\1122660632.index
............\.........\.........\........\....................\1663722865.index
............\.........\.........\........\....................\1704979481.index
............\.........\.........\........\....................\1857537744.index
............\.........\.........\........\....................\2441693876.index
............\.........\.........\........\....................\2652341506.index
............\.........\.........\........\....................\2950095195.index
............\.........\.........\........\....................\3410107132.index
............\.........\.........\........\....................\354893285.index
............\.........\.........\........\....................\3964209136.index
............\.........\.........\........\....................\4070439793.index
............\.........\.........\........\....................\externalLibsTimeStamps
............\.........\.........\........\....................\savedIndexNames.txt
............\.........\.........\........\....................\variablesAndContainers.dat
............\.........\.........\........\................launching\libraryInfos.xml
............\.........\.........\........\................ui\dialog_settings.xml
............\.........\.........\........\..................\OpenTypeHistory.xml
............\.........\.........\........\..................\QualifiedTypeNameHistory.xml
............\.........\.........\........\............ui.ide\dialog_settings.xml
............\.........\.........\........\..